Chemistry of Essential Oils

354 THE CHEMISTRY OF ESSENTIAL OILS

It contains phellandrene piperitone, eudesmol, and traces of euoa-

lyptol.

OIL OF EUCALYPTUS CONICA.

This oil has the following characters:—

Specific gravity 0*9057

Optical rotation + 5-2°

Refractive index 1-4733 at 16°

Saponification value 6- 26

Yield 0-59 per cent.

It contains pinene, traces of aromadendral, and 40 per cent, of euca-

lyptol.

OIL OF EUCALYPTUS GOBDATA.

This tree is a Tasmanian eucalypt, the oil having the following

characters:—

Specific gravity 0-9138

Optical rotation + 9-3°

Saponification value 14*8

Refractive index 1-4695 at 16°

Bucalyptol ........ .62 per cent.

Yield 2-32 „

OIL OF EUCALYPTUS COBIACE^J.

This tree is the white gum of most of the Australian Colonies. Its

oil ihas the following characters:—

Specific gravity 0*8947

Optical rotation - 29*3°

Saponification value 4-6

Refractive index 1-4846 at 20°

Eucalyptol 5 per cent.

Yield 0-45

It contains phellandrene, piperitone, eucalyptol, and a sesquiterpene.

OIL OF EUCALYPTUS COKYMBOSA.
This tree is the New South Wales and Queensland Bloodwood. Its
oil has the following characters:—

Specific gravity 0-881 to 0-887

Optical rotation - 8-5°

Refractive index 1-4895 at 16°

Yield 0-06 per cent.

It contains pinene, eucalyptol, and aromadendral.

OIL OF EUCALYPTUS COSMOPHYLLA.
This tree is a South Australian eucalypt, whose oil has the following
characters:—
Specific gravity 0-9108
Optical rotation
Saponification value
Refractive index
Eucalyptol
Yield

- 3-2°

5-6

1-4659 at 20°

53 per cent.

0-62 „

It contains pinene, eucalyptol, aromadendral, and sesquiterpenes.